-- --
-- S p e c --
-- --
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- Public License distributed with GNAT; see file COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- Expand routines for chapter 3 constructs
-with Types; use Types;
+with Types; use Types;
with Elists; use Elists;
+with Uintp; use Uintp;
package Exp_Ch3 is
procedure Expand_Previous_Access_Type (Def_Id : Entity_Id);
-- For a full type declaration that contains tasks, or that is a task,
-- check whether there exists an access type whose designated type is an
- -- incomplete declarations for the current composite type. If so, build
- -- the master for that access type, now that it is known to denote an
- -- object with tasks.
+ -- incomplete declarations for the current composite type. If so, build the
+ -- master for that access type, now that it is known to denote an object
+ -- with tasks.
+
+ procedure Expand_Record_Extension (T : Entity_Id; Def : Node_Id);
+ -- Add a field _parent in the extension part of the record
- procedure Expand_Derived_Record (T : Entity_Id; Def : Node_Id);
- -- Add a field _parent in the extension part of the record.
+ procedure Build_Class_Wide_Master (T : Entity_Id);
+ -- For access to class-wide limited types we must build a task master
+ -- because some subsequent extension may add a task component. To avoid
+ -- bringing in the tasking run-time whenever an access-to-class-wide
+ -- limited type is used, we use the soft-link mechanism and add a level of
+ -- indirection to calls to routines that manipulate Master_Ids. This must
+ -- also be used for anonymous access types whose designated type is a task
+ -- or synchronized interface.
procedure Build_Discr_Checking_Funcs (N : Node_Id);
-- Builds function which checks whether the component name is consistent
-- and the discriminant checking functions are inserted after this node.
function Build_Initialization_Call
- (Loc : Source_Ptr;
- Id_Ref : Node_Id;
- Typ : Entity_Id;
- In_Init_Proc : Boolean := False;
- Enclos_Type : Entity_Id := Empty;
- Discr_Map : Elist_Id := New_Elmt_List)
- return List_Id;
- -- Builds a call to the initialization procedure of the Id entity. Id_Ref
- -- is either a new reference to Id (for record fields), or an indexed
- -- component (for array elements). Loc is the source location for the
- -- constructed tree, and Typ is the type of the entity (the initialization
- -- procedure of the base type is the procedure that actually gets called).
- -- In_Init_Proc has to be set to True when the call is itself in an Init
- -- procedure in order to enable the use of discriminals. Enclos_type is
- -- the type of the init_proc and it is used for various expansion cases
- -- including the case where Typ is a task type which is a array component,
- -- the indices of the enclosing type are used to build the string that
- -- identifies each task at runtime.
+ (Loc : Source_Ptr;
+ Id_Ref : Node_Id;
+ Typ : Entity_Id;
+ In_Init_Proc : Boolean := False;
+ Enclos_Type : Entity_Id := Empty;
+ Discr_Map : Elist_Id := New_Elmt_List;
+ With_Default_Init : Boolean := False;
+ Constructor_Ref : Node_Id := Empty) return List_Id;
+ -- Builds a call to the initialization procedure for the base type of Typ,
+ -- passing it the object denoted by Id_Ref, plus additional parameters as
+ -- appropriate for the type (the _Master, for task types, for example).
+ -- Loc is the source location for the constructed tree. In_Init_Proc has
+ -- to be set to True when the call is itself in an init proc in order to
+ -- enable the use of discriminals. Enclos_Type is the enclosing type when
+ -- initializing a component in an outer init proc, and it is used for
+ -- various expansion cases including the case where Typ is a task type
+ -- which is an array component, the indices of the enclosing type are
+ -- used to build the string that identifies each task at runtime.
--
-- Discr_Map is used to replace discriminants by their discriminals in
-- expressions used to constrain record components. In the presence of
-- entry families bounded by discriminants, protected type discriminants
-- can appear within expressions in array bounds (not as stand-alone
-- identifiers) and a general replacement is necessary.
+ --
+ -- Ada 2005 (AI-287): With_Default_Init is used to indicate that the
+ -- initialization call corresponds to a default initialized component
+ -- of an aggregate.
+ --
+ -- Constructor_Ref is a call to a constructor subprogram. It is currently
+ -- used only to support C++ constructors.
+
+ procedure Build_Master_Renaming (N : Node_Id; T : Entity_Id);
+ -- If the designated type of an access type is a task type or contains
+ -- tasks, we make sure that a _Master variable is declared in the current
+ -- scope, and then declare a renaming for it:
+ --
+ -- atypeM : Master_Id renames _Master;
+ --
+ -- where atyp is the name of the access type. This declaration is
+ -- used when an allocator for the access type is expanded. The node N
+ -- is the full declaration of the designated type that contains tasks.
+ -- The renaming declaration is inserted before N, and after the Master
+ -- declaration.
+
+ function Freeze_Type (N : Node_Id) return Boolean;
+ -- This function executes the freezing actions associated with the given
+ -- freeze type node N and returns True if the node is to be deleted. We
+ -- delete the node if it is present just for front end purpose and we don't
+ -- want Gigi to see the node. This function can't delete the node itself
+ -- since it would confuse any remaining processing of the freeze node.
- procedure Freeze_Type (N : Node_Id);
- -- This procedure executes the freezing actions associated with the given
- -- freeze type node N.
+ procedure Init_Secondary_Tags
+ (Typ : Entity_Id;
+ Target : Node_Id;
+ Stmts_List : List_Id;
+ Fixed_Comps : Boolean := True;
+ Variable_Comps : Boolean := True);
+ -- Ada 2005 (AI-251): Initialize the tags of the secondary dispatch tables
+ -- of Typ. The generated code referencing tag fields of Target is appended
+ -- to Stmts_List. If Fixed_Comps is True then the tag components located at
+ -- fixed positions of Target are initialized; if Variable_Comps is True
+ -- then tags components located at variable positions of Target are
+ -- initialized.
function Needs_Simple_Initialization (T : Entity_Id) return Boolean;
-- Certain types need initialization even though there is no specific
- -- initialization routine. In this category are access types (which
- -- need initializing to null), packed array types whose implementation
- -- is a modular type, and all scalar types if Normalize_Scalars is set,
- -- as well as private types whose underlying type is present and meets
- -- any of these criteria. Finally, descendants of String and Wide_String
- -- also need initialization in Initialize/Normalize_Scalars mode.
+ -- initialization routine. In this category are access types (which need
+ -- initializing to null), packed array types whose implementation is a
+ -- modular type, and all scalar types if Normalize_Scalars is set, as well
+ -- as private types whose underlying type is present and meets any of these
+ -- criteria. Finally, descendants of String and Wide_String also need
+ -- initialization in Initialize/Normalize_Scalars mode.
function Get_Simple_Init_Val
(T : Entity_Id;
- Loc : Source_Ptr)
- return Node_Id;
- -- For a type which Needs_Simple_Initialization (see above), prepares
- -- the tree for an expression representing the required initial value.
- -- Loc is the source location used in constructing this tree which is
- -- returned as the result of the call.
+ N : Node_Id;
+ Size : Uint := No_Uint) return Node_Id;
+ -- For a type which Needs_Simple_Initialization (see above), prepares the
+ -- tree for an expression representing the required initial value. N is a
+ -- node whose source location used in constructing this tree which is
+ -- returned as the result of the call. The Size parameter indicates the
+ -- target size of the object if it is known (indicated by a value that is
+ -- not No_Uint and is greater than zero). If Size is not given (Size set to
+ -- No_Uint, or non-positive), then the Esize of T is used as an estimate of
+ -- the Size. The object size is needed to prepare a known invalid value for
+ -- use by Normalize_Scalars. A call to this routine where T is a scalar
+ -- type is only valid if we are in Normalize_Scalars or Initialize_Scalars
+ -- mode, or if N is the node for a 'Invalid_Value attribute node.
end Exp_Ch3;
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